My buddy has a 68 cuda with a 340 4 speed all stock,I told him Ive heard alot of horror stories about ttis and 4 speeds and he said he called their tech a couple times and they said no problem.I told him to let me know how that gos,well he did and they were far from a couple simple mods,dents,grinding and moving the z-bar-he was pissed!.Anyway I will never support a company that first gouges on pricing (they used to have options and were around $375 for uncoated-they even sold some with 1 3/4 tubes-not this pos step b.s.) and second lies and or covers up the problems acssociated with their product,thats just my two cents.